21121104333 has 8 divisors (see below), whose sum is σ = 32184539968. Its totient is φ = 12069202464.

The previous prime is 21121104307. The next prime is 21121104343. The reversal of 21121104333 is 33340112112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21121104333 - 2¹⁶ = 21121038797 is a prime.

It is a super-2 number, since 2×21121104333² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1005766873 = 21121104333 / (2 + 1 + 1 + 2 + 1 + 1 + 0 + 4 + 3 + 3 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121104343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502883416 + ... + 502883457.

It is an arithmetic number, because the mean of its divisors is an integer number (4023067496).

Almost surely, 2^21121104333 is an apocalyptic number.

It is an amenable number.

21121104333 is a deficient number, since it is larger than the sum of its proper divisors (11063435635).

21121104333 is a wasteful number, since it uses less digits than its factorization.

21121104333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005766883.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21121104333 its reverse (33340112112), we get a palindrome (54461216445).

The spelling of 21121104333 in words is "twenty-one billion, one hundred twenty-one million, one hundred four thousand, three hundred thirty-three".